Oh man, my PLD Wishlist is pretty big. I don't take credit to having thought up of anything this, some of it is just repeating earlier said stuff or finding it somewhere, some of it I thought of. None of this will ever happen though.
More AoEs!!
Savage Blade should hit 2 additional targets for 50 potency. Main target potency reduced by 25 and RoH and RA increased by 25 to compensate. IMO all cleave looking animations should cleave
Circle of Scorn CD reduced to 15 sec. Lets you refresh DOT and press something more frequently.
Maybe Flash doing minor damage? (would rather have the above 2 options so you don't spam 1 ability for aoe and run out of MP for next pull)
More Emphasis on Shields
Magic Attacks being blockable (only targeted obvious blockable ones like Fire and Blizzard, not Paralysis or AoE magics from bosses)
C'mon Paladins aren't just Gladiators, they should be able to use some Holy magic to block/absorb magic.
Bulwark reduced to 90 sec cd, Rampart increased to 120 sec to compensate. (nerf me more if you have to, blocking is awesome)
Shield Slam purging enemy debuffs like Haste. (lol maybe op and obviously not dispelling something that breaks encounter mechanics)
Cover effect extended to magic (since we would be able to block them)
More/Better Options on Cross Class Skills
Raise being cast in combat
Esuna being cross skilled (would be nice)
Don't mind losing Stoneskin, stone doesn't really fit the fantasy of PLD anyways.
Fracture being longer, maybe it still won't be used, but at least make it a viable option
TP Management
Shield Swipe or Riot Blade(in addition to MP) regenerating some TP (20 TP?)
Other Stuff
Tempered Will having a Surecast effect
Sword Oath and Shield Oath not breaking combos
Shield Oath not having such a penalty on DPS (15 or 10%)
Rage of Halone reducing int and dex in addition to str by 10%